What is the meaning of Ah?

An expression of relief, relaxation, comfort, confusion, understanding, wonder, awe, etc. according to uttered inflection.

A syllable used to fill space, particularly in music.

An instance of the interjection ah.

To give a cry of "ah".

Pronunciation spelling of I, most often indicating that the speaker is using a Scottish or American (particularly Southern) accent or African-American Vernacular English.

Marks a yes–no tag question prompting the listener to clarify or confirm something.

Reinforces a short, non-rhetorical wh-question.

Emphasizes the need for absolute confirmation, permission or acknowledgment.

A particle indicating the topic of a sentence from its comment.

A confirmative final particle used in the middle of a sentence to ascertain the continued attention of the listener.

Tagged at the end of non-interrogative sentence to convey a sense of informality or resignation.

Reinforces a short, sarcastic suggestion.

A vocative particle, now mostly used by Chinese elders for direct address (over telephone calls, or if the addressee is far away).

Used as an intensifier in fixed expressions, sometimes exhortative in meaning.

Used condescendingly, somewhat like “see?” or “I told you so”.

Yuck.

this, these (masculine)

beech (Fagus sylvatica)

ah (expression of relief, realization, awe)

ah (expression of woe, grief)

ah (expression of relief, realization, awe)

ah (expression of woe, grief)

yes

Exclamation of wonder: oh!

A letter of the Juǀ'hoan alphabet, written in the Latin script.

(one's) thing

alternative form of ac (“but”)

first/third-person singular present indicative of āgan

wood

tree

The name of the Latin-script letter A/a.

shark mullet (Rhinomugil nasutus), at a growth stage of approximately twelve inches

however, and, then

his, her, hers, its, third person singular possessive pronoun

Oh!; commonly used as an expression of approval.

romanization of 𒄴 (aḫ)

coral lime (for chewing/eating with betelnut)

oh: expressing of surprise

oh: expressing wonder, amazement, or awe

oh: expressing understanding, recognition, or realization

oh: preceding an offhand or annoyed remark

oh: an invocation or address

fowl

chicken (Gallus gallus)

used to express pleasure, e.g. because something tastes good or feels nice

used to express pleasant surprise

used to express reservations, slight disagreement, doubt etc.

ah (expressing understanding or surprise)

ah, oh

oh, ah

ah

ah (expression of understanding, etc.)

expressing understanding

expressing contentment

ah

oh, expresses compassion, surprise and dismay

ah! (usually ironic or sarcastic)

ah

Particle to express astonishment, disapproval, dismay, complaint, disagreement.

ah! (can be used for either warning or astonishment)

ah! (expression of relief, realization, awe)

ah! (expression of woe, grief)

ah

who

to be

ah (expression of relief, realization, awe)

ah (expression of woe, grief)

ah (expression of understanding, relaxation, contentment, etc.)

Source: wiktionary.org